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 > Newbie to hydraulic jacks

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Morden

Toronto Canada

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Posted: 06/13/10 09:27pm Link  |  Print  |  Notify Moderator

Just took over our first Class A with hydraulic jacks. They work fine but I forgot to look at them before using them for the first time. I raised them per the instructions but when I look underneath they are protruding below the chassis line.

I wish I had looked before using them to see if that is their normal retracted postion.

How far up do they go when retracted? Chances are they're just fine.

Fleet Man

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Posted: 06/13/10 09:48pm Link  |  Print  |  Notify Moderator

If you can't see any of the polished shaft, they are all the way up. You did not say what brand jacks you have installed but most are wired so you will get a warning chime if they are not fully retracted.


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ArchHoagland

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Posted: 06/13/10 11:03pm Link  |  Print  |  Notify Moderator

As mentioned above there should be no shiny shaft showing when retracted.

My jacks need to be sprayed with silicone dry lube while they are extended several times a year. I suggest you do the same.

If you don't spray them eventually you will start to have problems with them not retracting all the way.


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garym114

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Posted: 06/14/10 05:59am Link  |  Print  |  Notify Moderator

Fleet Man wrote:

If you can't see any of the polished shaft, they are all the way up. You did not say what brand jacks you have installed but most are wired so you will get a warning chime if they are not fully retracted.


Just a note: The warning light on the control panel for jacks down and the chime are not based on the position of the jacks. They are based on the level of hydraulic fluid in the tank. It all works as intended with the correct level of fluid in the tank. The most common is a low fluid tank level. The jacks will be all the way up but the indication will be that they are still down.


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Fleet Man

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Posted: 06/14/10 10:42am Link  |  Print  |  Notify Moderator

Gary,
On some of the HWH leveling systems, there is a switch on each jack to sense the full up position, not a fluid level sensor in the hydraulic tank. My system has a sensor wired at the top of each jack, thus my comment.

Dutch_12078

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Posted: 06/14/10 10:57am Link  |  Print  |  Notify Moderator

Fleet Man wrote:

Gary,
On some of the HWH leveling systems, there is a switch on each jack to sense the full up position, not a fluid level sensor in the hydraulic tank. My system has a sensor wired at the top of each jack, thus my comment.

Bigfoot leveling systems also have individual up switches at each jack.


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texasbaskets

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Posted: 06/14/10 11:00am Link  |  Print  |  Notify Moderator

Fleet Man wrote:

Gary,
On some of the HWH leveling systems, there is a switch on each jack to sense the full up position, not a fluid level sensor in the hydraulic tank. My system has a sensor wired at the top of each jack, thus my comment.


Mine is that way as well. You can see each individual jack light on the joystick control.

To answer the OP, the bases of mine show under the chassis as well.


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mchero

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Posted: 06/14/10 11:06am Link  |  Print  |  Notify Moderator

If you do add fluid to the hydraulic jacks check & fill with the jacks up. Do not check the level when the jacks are down.


Robert McHenry
Concord, NH.
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